MY177987A - Polishing composition for magnetic disk substrates, method for producing magnetic disk substrate, and magnetic disk substrate
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Polishing composition for magnetic disk substrates, method for producing magnetic disk substrate, and magnetic disk substrate
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Application filed by Fujimi IncfiledCriticalFujimi Inc
Publication of MY177987ApublicationCriticalpatent/MY177987A/en
This invention provides a magnetic disk substrate-polishing composition which is supplied to magnetic disk substrates to polish them. The polishing composition comprises an abrasive and water. The abrasive comprises at least silica particles. The abrasive in the polishing composition has a volume mean particle diameter Da, a volume mean particle diameter Db after a standard polishing test in which a Ni-P substrate is polished with the polishing composition, and a particle diameter change rate X of 80 % or higher, but 115 % or lower, determined by the next equation X = (Db/Da) ? 100.
MYPI2016703611A2015-09-302016-09-30Polishing composition for magnetic disk substrates, method for producing magnetic disk substrate, and magnetic disk substrate
MY177987A
(en)
Method for polishing glass substrate, method for manufacturing glass substrate, method for manufacturing magnetic-disk glass substrate, method for manufacturing magnetic disk, polishing liquid, and method for reducing cerium oxide